EP2421927B1 - Klebfolie mit rückstellenden eigenschaften - Google Patents

Klebfolie mit rückstellenden eigenschaften Download PDF

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Publication number
EP2421927B1
EP2421927B1 EP10701498.7A EP10701498A EP2421927B1 EP 2421927 B1 EP2421927 B1 EP 2421927B1 EP 10701498 A EP10701498 A EP 10701498A EP 2421927 B1 EP2421927 B1 EP 2421927B1
Authority
EP
European Patent Office
Prior art keywords
adhesive
layer
sublayers
backing
layers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP10701498.7A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2421927A1 (de
Inventor
Hermann Neuhaus-Steinmetz
Lars Guldbrandsen
Sven KÖNIG
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tesa SE
Original Assignee
Tesa SE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tesa SE filed Critical Tesa SE
Priority to PL10701498T priority Critical patent/PL2421927T3/pl
Publication of EP2421927A1 publication Critical patent/EP2421927A1/de
Application granted granted Critical
Publication of EP2421927B1 publication Critical patent/EP2421927B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C09J7/29—Laminated material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/08—Means for treating work or cutting member to facilitate cutting
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • C09J7/38—Pressure-sensitive adhesives [PSA]
    • C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • C09J7/385—Acrylic polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/20—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself
    • C09J2301/208—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself the adhesive layer being constituted by at least two or more adjacent or superposed adhesive layers, e.g. multilayer adhesive
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2453/00—Presence of block copolymer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
    • Y10T428/2848—Three or more layers

Definitions

  • the invention relates to an adhesive film with recovery properties, a process for their preparation and stamping products, which are produced with such adhesive film.
  • Front panels with labels and functional panels for electronic and other devices are industrially glued to casings or other substrates using double-sided adhesive tapes.
  • the adhesive tape made of roll or bale material is brought into the desired shape.
  • the adhesives tend to coalesce again since there are no forces to retract from the punched edges. This is increasingly the case if the punched mold surfaces are not removed immediately, but only at a later time, which is the case especially for manual further processing.
  • the DE 100 52 955 A1 discloses the use of pressure-sensitive adhesives having anisotropic properties for stamped products. Due to the anisotropic properties of such PSAs have a restoring behavior when they are coated in a stretched state on a support.
  • the adhesive is stretched during manufacture only in the machine direction, so that the desired effect is observed only at punching or cutting edges transverse to the direction.
  • punching or cutting edges in the longitudinal direction the tendency to re-sticking exists exactly as in conventional adhesive tapes.
  • the object of the invention is to provide adhesive films which, compared with the prior art, have improved processing properties, in particular in stamping processes, in which the stamping or cutting edges do not stick together again during or after a stamping or cutting process, and which have the advantageous properties over a sufficiently long period.
  • an adhesive film is provided, in particular for use in a stamping process, which comprises a support and at least one layer of an adhesive, wherein the adhesive has two or more sub-layers and at least one of the sub-layers is in a mechanically tensioned state.
  • the adhesive film according to the invention has advantageous properties due to the lower layer, which is in a mechanically tensioned state.
  • a confluence of the adhesive is not at punching or cutting edges, which extend transversely to the direction, but also prevents punching or cutting edges in the longitudinal direction. Furthermore, the confluence is prevented in comparison to the previously known adhesive films for a considerably longer period.
  • the adhesive film comprises a carrier and layers of an adhesive on both sides of the carrier, wherein one or both layers of adhesive layers are composed of sub-layers having different properties, and wherein at least one of the sub-layers is mechanically tensioned.
  • film in the present invention refers to planar structures of all kinds and in particular also includes two-dimensionally flat structures (eg rolls, bales) as well as elongated structures (eg adhesive tapes). Similarly, the term “film” includes two dimensionally limited entities (eg, labels).
  • the backing is coated on one side or both sides with a layer of adhesive.
  • This layer of an adhesive is also referred to below as an adhesive layer.
  • the adhesive layer consists of several sublayers.
  • the term "lower layer” refers to a part of the adhesive layer, this part itself is layered.
  • the adhesive layer comprises at least two such sublayers. One of these sublayers is in a mechanically tensioned state.
  • underlayer in a mechanically tensioned state is meant in particular an underlayer with mechanical properties which cause the stresses in the underlayer to relax due to the stretched state only after a very long time.
  • the mechanically strained state of the lower layer is frozen.
  • the adhesive films according to the invention Due to the mechanically tensioned state, the adhesive films according to the invention have a restoring behavior, so that during the stamping, cutting or squeezing process, the mechanically stressed adhesive sublayers are retracted and thus the whole adhesive layer comes. A re-flow of the adhesive after punching, cutting or squeezing the adhesive film is thus prevented.
  • the outer sub-layer of the adhesive layer i. H. the underlayer facing away from the wearer is adhesive, while at least one of the underlayer facing the wearer, for example the underlayer adjacent to the wearer, is a backsheet which is in a mechanically tensioned state.
  • the restoring behavior of the adhesive film can be produced by stretching the adhesive composition layers during the coating and placing them on the carrier or a release liner in the stretched state. This can be done, for example, with an extrusion die whose gap for the adhesive mass exit is significantly greater than the subsequent layer thickness of the adhesive on the substrate.
  • the stretching takes place monoaxially, particularly preferably in the longitudinal direction (nozzle exit direction). It is also possible that in addition a stretching in the transverse direction is made, so that a biaxial stretching is present.
  • Advantageous adhesive films according to the invention are double-sided adhesive, in their case the carrier is thus coated on both sides with adhesive.
  • a method for producing the adhesive film of the invention is further provided, wherein an adhesive comprising two or more sub-layers is coated in the stretched state onto a sheet material to obtain the adhesive layer, wherein at least one of the sub-layers of the adhesive Layer is present in a mechanically tensioned state.
  • a carrier is coated in a stretched state via a coextrusion die with an adhesive composed of two or more sublayers and crosslinked.
  • at least the outer lower layer is adhesive.
  • At least one of the, preferably non-outer, lower layers has mechanical properties which cause the stresses to relax only after a very long time due to the stretched state.
  • the adhesive layer is covered with a release liner.
  • the other side of the carrier is coated in a stretched state via a coextrusion die with an adhesive consisting of two or more sublayers and crosslinked.
  • at least the outer lower layer is adhesive.
  • At least one of the, preferably non-outer, lower layers has mechanical properties which cause the stresses to relax only after a very long time due to the stretched state.
  • a release liner is coated via a coextrusion die with an adhesive in the stretched state, consisting of two or more sub-layers, and then crosslinked.
  • at least the outer lower layer is adhesive.
  • At least one of the, preferably non-outer sublayers of the adhesive layer has mechanical properties which cause the stresses to relax only after a very long time due to the stretched state.
  • the support is laminated to the mass layer.
  • the other side of the carrier via a co-extrusion die with a mass in the stretched state, consisting of two or more sub-layers, coated and then crosslinked.
  • at least the outer lower layer is adhesive.
  • At least one of the preferably non-outer sub-layers has mechanical properties which cause the stresses to relax only after a very long time due to the stretched state.
  • an adhesive in the stretched state consisting of two or more sub-layers, via a coextrusion on a roller with a surface from which an adhesive mass is removable, coated, the separating effect of the mass surface for Example of a structure, a coating, a trailing release web or a fluid layer on the roller can be achieved.
  • the crosslinking takes place on the described roller.
  • the adhesive is laminated to a release liner.
  • at least the lower layer facing the release liner is adhesive.
  • At least one of the sub-layers has mechanical properties which cause the stresses to relax for a very long time due to the stretched state.
  • the support is laminated to the adhesive layer.
  • a similar or similar adhesive composition with two or more sublayers is again produced via a coextrusion die coated on a same roll in a stretched state and crosslinked. Subsequently, the mass of the roller is laminated to the carrier side of the composite from the previous step.
  • a further improved restoring behavior of the adhesive film is achieved by at least one adhesive having an elastic recovery behavior.
  • both adhesives advantageously show this behavior.
  • anisotropic adhesives are used.
  • the weight-average molecular weight M w is determined by gel permeation chromatography (GPC).
  • the eluent used is THF with 0.1% by volume of trifluoroacetic acid. The measurement takes place at 25 ° C.
  • the precolumn used is PSS-SDV, 5 ⁇ , 10 3 ⁇ , ID 8.0 mm ⁇ 50 mm.
  • the refractive index (today usually referred to as refractive index) is a substance constant and represents the optical density or the speed of propagation of light waves in a material.
  • the refractive index of the adhesives is determined using an Abbe refractometer according to DIN 51423. According to the DIN standard, the measurement is carried out at a temperature of 20 ° C and at a wavelength of 589th nm with a sodium spectral lamp (refractive index for the sodium d-line corresponding to 589 nm at 20 ° C).
  • punched pieces are also provided, which are produced by punching an adhesive film according to the invention.
  • FIG. 1 shown embodiment of the adhesive film 1 according to the invention is on both sides with an adhesive layer 5, 5 'equipped.
  • the adhesive film 1 has a carrier 2, whose first surface is coated with a first adhesive layer 5.
  • the adhesive layer 5 consists of two sub-layers 3, 4.
  • the carrier 2 facing, inner sub-layer 3 of the adhesive layer 5 is in the mechanically tensioned state, while the carrier 2 remote from the outer sub-layer 4 of the adhesive layer 5 adhesive equipped.
  • the second surface of the carrier 2 is coated with a second adhesive layer 5 '.
  • the adhesive layer 5 ' consists of two sub-layers 3', 4 '.
  • the inner sub-layer 3 'of the second adhesive layer 5' facing the carrier 2 is in the mechanically tensioned state, while the outer sub-layer 4 'of the adhesive layer 5' facing away from the carrier 2 is adhesively equipped.
  • a release liner 6 has been applied before the application of the second adhesive layer 5 '.
  • Each of the adhesive layers 5, 5 ' may comprise further sub-layers. Further, the adhesive layers 5, 5 'may differ in construction, for example, in terms of the number of sub-layers, as well as in the chemical composition of the sub-layers.
  • Adhesive film shown is coated on one side only with an adhesive layer (5).
  • the adhesive layer 5 consists of two sub-layers 3, 4.
  • the carrier 2 facing, inner sub-layer 3 of the adhesive layer 5 is mechanically tensioned state before, while the carrier 2 remote, outer lower layer 4 of the adhesive layer 5 is adhesive equipped.
  • the adhesive layer 5 may comprise further sublayers.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Adhesive Tapes (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Laminated Bodies (AREA)
EP10701498.7A 2009-04-24 2010-01-18 Klebfolie mit rückstellenden eigenschaften Not-in-force EP2421927B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL10701498T PL2421927T3 (pl) 2009-04-24 2010-01-18 Folia klejąca o elastycznych właściwościach

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009018519 2009-04-24
PCT/EP2010/050539 WO2010121843A1 (de) 2009-04-24 2010-01-18 Klebfolie mit rückstellenden eigenschaften

Publications (2)

Publication Number Publication Date
EP2421927A1 EP2421927A1 (de) 2012-02-29
EP2421927B1 true EP2421927B1 (de) 2017-11-22

Family

ID=42225071

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10701498.7A Not-in-force EP2421927B1 (de) 2009-04-24 2010-01-18 Klebfolie mit rückstellenden eigenschaften

Country Status (11)

Country Link
US (1) US20120040182A1 (zh)
EP (1) EP2421927B1 (zh)
JP (1) JP2012524823A (zh)
KR (1) KR20120006558A (zh)
CN (1) CN102395639B (zh)
CA (1) CA2755309A1 (zh)
DE (1) DE112010001719A5 (zh)
ES (1) ES2654330T3 (zh)
MX (1) MX336331B (zh)
PL (1) PL2421927T3 (zh)
WO (1) WO2010121843A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW201405590A (zh) * 2012-07-25 2014-02-01 Benq Materials Corp 異方性導電膜
CN111037648B (zh) * 2019-12-03 2022-04-29 苏州天立达精密科技股份有限公司 一种较厚双层胶体排废工艺

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10052955A1 (de) 2000-10-25 2002-06-06 Tesa Ag Verwendung von Haftklebemassen mit anisotropen Eigenschaften für Stanzprodukte
DE10132534A1 (de) * 2001-07-09 2003-01-30 Tesa Ag Biaxial verstreckte Klebebänder und Verfahren zu deren Herstellung
DE10156088A1 (de) * 2001-11-16 2003-06-05 Tesa Ag Orientierte Acrylatblockcopolymere
DE10157152A1 (de) 2001-11-22 2003-10-16 Tesa Ag Verfahren zur Herstellung haftklebriger Stanzprodukte
DE10157153A1 (de) 2001-11-22 2003-09-04 Tesa Ag Verfahren zur Herstellung haftklebriger Stanzprodukte
DE10361164A1 (de) * 2003-12-22 2005-08-04 Tesa Ag Klebfolie mit rückstellenden Eigenschaften
JP4410055B2 (ja) * 2004-08-02 2010-02-03 日東電工株式会社 位相差粘着剤層、その製造方法、粘着型光学フィルム、その製造方法および画像表示装置
DE102005050104A1 (de) * 2005-10-18 2007-04-19 Tesa Ag Verfahren zur Herstellung anisotroper Haftklebemassen

Also Published As

Publication number Publication date
US20120040182A1 (en) 2012-02-16
CA2755309A1 (en) 2010-10-28
MX2011010972A (es) 2011-11-18
CN102395639B (zh) 2015-05-06
EP2421927A1 (de) 2012-02-29
WO2010121843A1 (de) 2010-10-28
ES2654330T3 (es) 2018-02-13
CN102395639A (zh) 2012-03-28
KR20120006558A (ko) 2012-01-18
PL2421927T3 (pl) 2018-02-28
JP2012524823A (ja) 2012-10-18
DE112010001719A5 (de) 2012-08-16
MX336331B (es) 2016-01-15

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